Service Delcotron And Regulator; Service Belts; Tighten Manifold; Service Fuel Lines And Fuel Filter - Chevrolet CHEVY VAN G10 SERIES Service Manual

HOLD
D O N O T SUCK
IN TO O MUCH
VERTICAL
ELECTROLYTE
FLOAT MUST
BE FREE
Fig. 7 —T e s tin g S p e c ific G ra v ity o f B a tte ry
neutralize any acid present and then flush o ff w ith clean
water. Keep vent plugs tight so th a t the neutralizing
solution does n o t enter the cell. T he hold dow n bolts
should be kept tight enough to prevent the b attery from
shaking around in its holder, b u t th ey should n ot be
tightened to th e point where the b attery case will be
placed under a severe strain.
To insure good co n tact, the b attery cables should
be tight on the b attery posts. Oil b attery term inal felt
washer. I f the b attery posts or cable term inals are
corroded, the cables should be cleaned separately w ith a
soda solution and wire brush. A fter cleaning and before
installing clam ps, apply a thin coating or p etro latu m to
th e posts and cable clamps to help retard corrosion.
I f the b attery has rem ained undercharged, check for
loose or defective fan b elt, defective D elcotron, high
resistance in the charging circuit, oxidized regulator
contact points, or a low voltage setting.
Fig. 8 —Checking Belt Tension
TAKE READING
AT EYE LEVEL

SERVICE DELCOTRON AND REGULATOR

The D elcotron and regulator tests during tune up consist of
the above b attery tests; the condition o f the b attery indicating
further tests and adjustm ents as outlined in Section
SERVICE BELTS (FIG . 8)
Inspect belt condition.
Check and adjust if necessary for correct tension o f b elt, as
follows:
SERVICE M A N IF O LD HEAT V A LV E (FIG . 9 or 10)
Check m anifold h eat control valve for freedom o f opera­
tion. If shaft is sticking, free it up w ith GM Manifold Heat
C ontrol Solvent or its equivalent.
TIG H TEN M A N IF O LD
Tighten intake m anifold bolts to specifications in the
sequence outlined on T orque Sequence C hart located at end of
Engine Mechanical section. A slight leak at th e intake m anifold
destroys engine perform ance and econom y.

SERVICE FUEL LINES AND FUEL FILTER

1. Inspect fuel lines for kinks, bends or leaks and correct
2.
Fig. 9 —M a n ifo ld Heat C o n tro l Valve (In Line )
If the b attery has been using too m uch water, the
voltage o u tp u t is to o high.
• Using a strand tension gauge, check the belt tension.
• If belt is below the m inim um , adjust until the
specified tension is reached. (See Tune Up Chart in
Specification section.)
N O T E : Tap shaft end to end to help free it up.
any defects found. Refer to Section
fabrication and replacem ent procedures for fuel lines.
Inspect filter and replace if plugged.
ENG INE 6-5
6
Y.
8
for the correct
C H E V Y V A N SH O P M A N U A L